نتایج جستجو برای: tear film instability

تعداد نتایج: 188590  

2016
Marija RADENKOVIĆ Marija Radenković Gordana Stanković-Babić Predrag Jovanović Jasmina Djordjević-Jocić Marija Trenkić-Božinović

Marija RADENKOVIĆ Clinic for Eye Diseases Clinical Center of Niš Bulevar dr Zorana Djindjića 48 18000 Niš Serbia [email protected] SUMMARY Introduction Ocular surface disease (OSD) is a multifactorial disease of the tears and ocular surface that results in symptoms of discomfort, visual disturbances, tear film instability with potential damage to the ocular surface, accompanied by increased tear ...

Journal: :Investigative ophthalmology & visual science 2009
Nuo Dong Wei Li Hui Lin Huping Wu Cheng Li Wensheng Chen Wenjuan Qin Luowa Quyang Hua Wang Zuguo Liu

PURPOSE To investigate the differentiation of conjunctival epithelium and tear film function in pingueculae. METHODS Twelve patients (12 eyes) who underwent simple excision for pingueculae were enrolled in the study. Immunostaining for K14, K19, K10, MUC5AC, Pax6, P63, Ki67, and K16 was performed on the pinguecula epithelium and normal conjunctival epithelium. Schirmer I test results and tear...

Journal: :Investigative ophthalmology & visual science 2003
Jianhua Wang Desmond Fonn Trefford L Simpson Lyndon Jones

PURPOSE To demonstrate the feasibility of indirectly measuring the precorneal tear film thickness and pre- and postlens tear film (PLTF) thickness using optical coherence tomography (OCT). METHODS Central corneal thickness (C(1)) which includes the tear film (T) of both eyes of 40 non-contact lens wearers was measured using OCT after calibration. The mean age of the 40 subjects was 31.2 +/- 9...

2017
Samiyyah Sledge Collin Henry Douglas Borchman Marta C. Yappert Rahul Bhola Aparna Ramasubramanian Ryan Blackburn Jonathan Austin Kayla Massey Shanzeh Sayied Aliza Williams Georgi Georgiev Kenneth N. Schikler

Tear stability decreases with increasing age and the same signs of instability are exacerbated with dry eye. Meibum lipid compositional changes with age provide insights into the biomolecules responsible for tear film instability. Meibum was collected from 69 normal donors ranging in age from 0.6 to 68 years of age. Infrared spectroscopy was used to measure meibum lipid phase transition paramet...

2015
Jia-Zeng Su Zhi-Gang Cai Guang-Yan Yu

Dry eye syndrome is a relatively common disease of the tears and ocular surfaces that results in discomfort, visual disturbance, and tear film instability with possible damage to the ocular surfaces. Microvascular submandibular gland (SMG) transfer offers a surgical alternative for a permanent autologous substitution of tears using the basal secretion of a transplanted SMG. Long-term follow-up ...

Journal: :Journal of ophthalmology 2016
Iman M Eissa Noha M Khalil Heba A El-Gendy

Purpose. To assess the tear film quantity and correlate it with the quality and stability of the tear film in diabetics and compare them to age matched controls. Introduction. Diabetes affects tear film parameters in multiple ways. Poor metabolic control and neuropathy are postulated factors. To further understand how diabetes affects tear film parameters this study was conducted. Subjects and ...

2018
Sean J McCafferty Eniko T Enikov Jim Schwiegerling Sean M Ashley

Purpose The aim of the study was to quantify the isolated tear film adhesion error in a Goldmann applanation tonometer (GAT) prism and in a correcting applanation tonometry surface (CATS) prism. Methods The separation force of a tonometer prism adhered by a tear film to a simulated cornea was measured to quantify an isolated tear film adhesion force. Acrylic hemispheres (7.8 mm radius) used a...

2016
Anastasios John Kanellopoulos George Asimellis

Dry eye is a multifactorial, progressive, and chronic disease of the tears and ocular surface. The disease is multi-factorial and has intermittent symptoms. Discomfort, visual disturbance, tear film instability with potential damage to the ocular surface, and increased tear film osmolarity are known associates. Dry eye is a common clinical problem for eye-care providers worldwide and there is a...

Journal: :Ophthalmology 2012
Ulla Edén Per Fagerholm Reza Danyali Neil Lagali

OBJECTIVE To document the clinical and morphologic corneal findings in the early stages of congenital aniridic keratopathy in Swedish families. DESIGN Prospective, observational, comparative case series. PARTICIPANTS A total of 16 eyes of 16 subjects with congenital aniridic keratopathy and a clear central cornea, and 6 eyes from 6 healthy controls (unaffected relatives). Nine of the 16 eye...

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